infirm (adj.)

• abulic
• adrift
• afloat
• afraid
• ailing
• alternating
• amorphous
• anile
• cachectic
• capricious
• carnal
• changeable
• changeful
• cowardly
• crabbed
• crippled
• dangerous
• debilitated
• decrepit
• desultory
• dizzy
• doddering
• doddery
• drained
• eccentric
• enervated
• erratic
• erring
• exhausted
• failing
• faint
• fainthearted
• fallen
• faltering
• feeble
• feebleminded
• fickle
• fitful
• fleshly
• flickering
• flighty
• flimsy
• fluctuating
• fossilized
• fragile
• frail
• freakish
• giddy
• hazardous
• ill
• impetuous
• impulsive
• impure
• inconsistent
• inconstant
• indecisive
• indisposed
• insecure
• insubstantial
• invalid
• invertebrate
• irregular
• irresolute
• irresponsible
• lame
• lapsed
• mazy
• mercurial
• moody
• moribund
• moth-eaten
• pale
• palsied
• peaked
• peaky
• peccable
• perilous
• pliable
• poor
• precarious
• prodigal
• provisional
• rambling
• reduced
• restless
• rickety
• risky
• rotten
• roving
• run-down
• rusty
• scatterbrained
• senile
• shaky
• shapeless
• shifting
• shifty
• shriveled
• sick
• sickly
• slippery
• soft
• spasmodic
• spineless
• temporary
• tentative
• ticklish
• timeworn
• tottering
• tottery
• treacherous
• unaccountable
• uncertain
• unchaste
• unclean
• uncontrolled
• undependable
• undisciplined
• unfirm
• unfixed
• ungodly
• unhealthy
• unpredictable
• unreliable
• unrestrained
• unrighteous
• unsettled
• unsound
• unstable
• unsteady
• unsubstantial
• unsure
• untrustworthy
• unwell
• vacillating
• vagrant
• valetudinarian
• valetudinary
• variable
• volatile
• wandering
• wanton
• wasted
• wavering
• wavy
• wayward
• weak
• weak-kneed
• weakened
• weakly
• whimsical
• wishy-washy
• withered
• wizened
• wobbling
• wobbly